210101210001 has 12 divisors (see below), whose sum is σ = 303546919312. Its totient is φ = 140036368536.

The previous prime is 210101209979. The next prime is 210101210003. The reversal of 210101210001 is 100012101012.

It is a happy number.

It is not a de Polignac number, because 210101210001 - 2⁹ = 210101209489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210101210003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2549251 + ... + 2630376.

Almost surely, 2^210101210001 is an apocalyptic number.

It is an amenable number.

210101210001 is a deficient number, since it is larger than the sum of its proper divisors (93445709311).

210101210001 is a wasteful number, since it uses less digits than its factorization.

210101210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184140 (or 5184137 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210101210001 its reverse (100012101012), we get a palindrome (310113311013).

It can be divided in two parts, 2101012 and 10001, that multiplied together give a palindrome (21012221012).

The spelling of 210101210001 in words is "two hundred ten billion, one hundred one million, two hundred ten thousand, one".